use auto_string() where appropriate to kill a few statics

Custom linker script 'busybox_ldscript' found, using it
function                                             old     new   delta
static.str                                             4       -      -4
static.passwd                                          4       0      -4
bb_ask                                               322     311     -11
ether_print                                           63      47     -16
UNSPEC_print                                          82      66     -16
INET_sprint                                           59      38     -21
INET6_sprint                                          54      30     -24
make_human_readable_str                              292     235     -57
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 0/7 up/down: 0/-153)           Total: -153 bytes
   text	   data	    bss	    dec	    hex	filename
 939880	    992	  17480	 958352	  e9f90	busybox_old
 939736	    992	  17456	 958184	  e9ee8	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 6 insertions, 18 deletions

diff --git a/networking/interface.c b/networking/interface.c
index b0572d04e..24bd13c57 100644
--- a/networking/interface.c
+++ b/networking/interface.c
@@ -89,13 +89,9 @@ struct in6_ifreq {
 /* Display an Internet socket address. */
 static const char* FAST_FUNC INET_sprint(struct sockaddr *sap, int numeric)
 {
-	static char *buff; /* defaults to NULL */
-
 	if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
 		return "[NONE SET]";
-	free(buff);
-	buff = INET_rresolve((struct sockaddr_in *) sap, numeric, 0xffffff00);
-	return buff;
+	return auto_string(INET_rresolve((struct sockaddr_in *) sap, numeric, 0xffffff00));
 }
 
 #ifdef UNUSED_AND_BUGGY
@@ -171,13 +167,9 @@ static const struct aftype inet_aftype = {
 /* dirty! struct sockaddr usually doesn't suffer for inet6 addresses, fst. */
 static const char* FAST_FUNC INET6_sprint(struct sockaddr *sap, int numeric)
 {
-	static char *buff;
-
 	if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
 		return "[NONE SET]";
-	free(buff);
-	buff = INET6_rresolve((struct sockaddr_in6 *) sap, numeric);
-	return buff;
+	return auto_string(INET6_rresolve((struct sockaddr_in6 *) sap, numeric));
 }
 
 #ifdef UNUSED
@@ -223,13 +215,11 @@ static const struct aftype inet6_aftype = {
 /* Display an UNSPEC address. */
 static char* FAST_FUNC UNSPEC_print(unsigned char *ptr)
 {
-	static char *buff;
-
+	char *buff;
 	char *pos;
 	unsigned int i;
 
-	if (!buff)
-		buff = xmalloc(sizeof(struct sockaddr) * 3 + 1);
+	buff = auto_string(xmalloc(sizeof(struct sockaddr) * 3 + 1));
 	pos = buff;
 	for (i = 0; i < sizeof(struct sockaddr); i++) {
 		/* careful -- not every libc's sprintf returns # bytes written */
@@ -712,14 +702,12 @@ static const struct hwtype loop_hwtype = {
 /* Display an Ethernet address in readable format. */
 static char* FAST_FUNC ether_print(unsigned char *ptr)
 {
-	static char *buff;
-
-	free(buff);
+	char *buff;
 	buff = xasprintf("%02X:%02X:%02X:%02X:%02X:%02X",
 			 (ptr[0] & 0377), (ptr[1] & 0377), (ptr[2] & 0377),
 			 (ptr[3] & 0377), (ptr[4] & 0377), (ptr[5] & 0377)
 		);
-	return buff;
+	return auto_string(buff);
 }
 
 static const struct hwtype ether_hwtype = {